In less than two months, Apple's iPhone has been successfully
unlocked via software courtesy of iPhoneSimfree.com. The iPhone is currently
tied exclusively to AT&T for the foreseeable future, but the new software hack
allows users to hop to competing GSM networks such as T-Mobile.

According to Engadget,
the unlock process took no longer than a few minutes and caused no harm to the
iPhone used. Once unlocked, the iPhone was able to successfully make and receive calls using
the T-Mobile network. For the most part, all other iPhone features are also intact
including EDGE support and SMS send/receive. Visual voicemail isn't in the
cards as it is an AT&T network-specific feature; however, normal voicemail
is accessible using the software hack.

Engadget also
notes that the software hack is completely upgrade and restore resistant. They
verified this by performing a full system restore using the v1.0.2 update.

"Again: we can confirm with 100% certainty that
iPhoneSIMfree.com's software solution completely SIM unlocks the iPhone, is
restore-resistant, and should make the iPhone fully functional for users
outside of the US," said Engadget's
Ryan Block.